Alert archive / North Dakota / Mesoscale Discussions in 2018

Mesoscale Discussion 601

May 31, 20189 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at May 31, 2018, 6:00 PM MDT for 9 counties in North Dakota. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: May 31, 2018, 6:00 PM MDT (00:00 UTC)
Expired: May 31, 2018, 7:30 PM MDT
In force: 90 min
Issued by: the Storm Prediction Center

Counties Adams County, ND, Burleigh County, ND, Emmons County, ND, Grant County, ND, Hettinger County, ND, Kidder County, ND, Morton County, ND, Oliver County, ND, Sioux County, ND

The radar

The Bismarck radar (KBIS), 53 km from the middle of the area, began a volume at 00:00 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 0.0 hours before the alert went out and 58 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 332 J/kg
Mixed-layer CIN: -127 J/kg
Mixed-layer LCL: 1884 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 143 m²/s²
0-3 km storm-relative helicity: 279 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 31, 8:18 PM MDT	Mesoscale Discussion	SPC	Adams, Bowman, Grant, Hettinger, Morton, Sioux and 1 more	57 min
Jun 1, 11:45 AM MDT	Severe Thunderstorm Watch	SPC	Adams, Billings, Bowman, Golden Valley, Hettinger, Slope and 1 more	6 hr
Jun 1, 1:13 PM MDT	Mesoscale Discussion	SPC	Adams, Billings, Burke, Burleigh, Dunn, Emmons and 19 more	2 hr
Jun 1, 2:30 PM MDT	Tornado Watch	SPC	Bottineau, Burke, Burleigh, Divide, Dunn, Emmons and 18 more	6 hr
Jun 1, 3:04 PM MDT	Mesoscale Discussion	SPC	Billings, Bowman, Golden Valley, Slope	86 min
Jun 1, 5:02 PM MDT	Mesoscale Discussion	SPC	Bottineau, Burke, Burleigh, Divide, Dunn, Emmons and 15 more	88 min

Nearby

Mesoscale Discussions in North Dakota, 2018 Every mesoscale discussion in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.